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/*
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2006 Rob Kendrick <rjek@rjek.com>
*/
/** \file
* Page thumbnail creation (implementation).
*
* Thumbnails are created by setting the current drawing contexts to the
* bitmap (a gdk pixbuf) we are passed, and plotting the page at a small
* scale.
*/
#include <assert.h>
#include <gtk/gtk.h>
#include "netsurf/content/content.h"
#include "netsurf/content/urldb.h"
#include "netsurf/desktop/plotters.h"
#include "netsurf/desktop/browser.h"
#include "netsurf/image/bitmap.h"
#include "netsurf/render/font.h"
#include "netsurf/utils/log.h"
#include "netsurf/gtk/gtk_window.h"
#include "netsurf/gtk/gtk_plotters.h"
#include "netsurf/gtk/gtk_bitmap.h"
/**
* Create a thumbnail of a page.
*
* \param content content structure to thumbnail
* \param bitmap the bitmap to draw to
* \param url the URL the thumnail belongs to, or NULL
*/
bool thumbnail_create(struct content *content, struct bitmap *bitmap,
const char *url)
{
GdkPixbuf *pixbuf = gtk_bitmap_get_primary(bitmap);
gint width = gdk_pixbuf_get_width(pixbuf);
gint height = gdk_pixbuf_get_height(pixbuf);
gint depth = (gdk_screen_get_system_visual(gdk_screen_get_default()))->depth;
GdkPixmap *pixmap = gdk_pixmap_new(NULL, content->width, content->width, depth);
GdkPixbuf *big;
assert(content);
assert(bitmap);
gdk_drawable_set_colormap(pixmap, gdk_colormap_get_system());
/* set the plotting functions up */
plot = nsgtk_plotters;
nsgtk_plot_set_scale(1.0);
/* set to plot to pixmap */
current_drawable = pixmap;
current_gc = gdk_gc_new(current_drawable);
#ifdef CAIRO_VERSION
current_cr = gdk_cairo_create(current_drawable);
#endif
plot.fill(0, 0, content->width, content->width, 0xffffffff);
/* render the content */
content_redraw(content, 0, 0, content->width, content->width,
0, 0, content->width, content->width, 1.0, 0xFFFFFF);
/* resample the large plot down to the size of our thumbnail */
big = gdk_pixbuf_get_from_drawable(NULL, pixmap, NULL, 0, 0, 0, 0,
content->width, content->width);
gdk_pixbuf_scale(big, pixbuf, 0, 0, width, height, 0, 0,
(double)width / (double)content->width,
(double)height / (double)content->width,
GDK_INTERP_TILES);
/* As a debugging aid, try this to dump out a copy of the thumbnail as
* a PNG: gdk_pixbuf_save(pixbuf, "thumbnail.png", "png", NULL, NULL);
*/
/* register the thumbnail with the URL */
if (url)
urldb_set_thumbnail(url, bitmap);
bitmap_modified(bitmap);
g_object_unref(current_gc);
#ifdef CAIRO_VERSION
cairo_destroy(current_cr);
#endif
g_object_unref(pixmap);
g_object_unref(big);
return true;
}
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